⚠
warning ADT
Error Code Alarm
An intrusion has been detected and the system is armed.
? What Causes This
Detected intrusion via sensors.
✓ How to Fix It
Identify and secure the breached zone, then disarm/rearm as necessary.
Source: page 19 of the official manual
From the manual
This error code appears in:
ADT Safewatch Pro 3000